Where to buy Proactiv in the GTA?

Toronto Eaton's Centre and Fairview (not extremely sure about Fairview... it's been a while since I've checked, but I'm definitely sure that Eaton's Centre has it) have small stores/booths that sell Proactive.

Not for me. But assuming you have minor to mild acne, it'll work fairly well. But if you have severe acne (like me), Proactiv won't work. In this situation, using accutane would be a much better option.

To OP: I have also seen Proactiv being sold at a kiosk at Promenade (centre + bathurst).